I have an automatic and it did not like a 90deg bend in the tubing right before the intake manifold. I reconfigured it 3 diferent ways. I even gutted the piping fron the inner air box and it did not like that bend either. that's why i went with the short ram intake.
I also read a thread a while back not to use PVC and I can't remember why.You might want to look for that.